Power-sieve



R. G. LOWE.

' POWER SIEVE. APPLICATION FILED APR.-12. 1920.

Patented Nov. 2, 1920.

2 SHEETS-SHEET l.

Patented Nov. 2, 1920.

2 SHEETS-SHEET 2.

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n n l l W H m 5 w H1 l [I hTllIll II: a H "II 3 5 H Id RQMIW o w QJ UNITED STATES PATENT OFFICE.

ROBERT G. LOWE, OF CLAWSON, MICHIGAN.

POWER-SIEVE.

To all whom it may concern:

Be it known that I, ROBERT G. Lowe, a citizen of the United States, and residing at Clawson, in the county ofOakland and State of Michigan, have invented a new and Improved Power-Sieve, of which the followlng is a specification.

This invention relates to means for shaking and agitating sieves and screens and other containers, for foundry sand, bullders sand, other granular substances, and for l quids, and its object is to provide a device of this character which shall have maxlmum capacity, which shall be simple in construction and which shall not be liable to get out of order.

This invention consists, in the combination of an electric motor comprising the usual armature and its shaft and a field housing of any desired type, of a casmg wherein the motor is mounted with 1ts armature shaft upright, of an eccentric at one or bothends of the. armature shaft journaled in said casing so'that when the armature rotates, the upper part of the casing Wlll be caused to move around in a circular path of small diameter, of means whereby th1s casing may be suspended, and a container, screen, sieve or riddle mounted above the casing and connected thereto so that 1t Wlll receive a rapid circular motion therefrom.

It also consists in the details of construction illustrated in the accompanying drawing and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is an elevation of this improved sand sifting machine. Fig. 2 is a section on the line 2-2 of Fig. 1. Fig. 3 is a central vertical elevation of this improved machine. Fig. 4 is a section on the line 4-4 of Fig. 3. Fig. 5 is a vertical section of an improved type of eccentric for the upper end of the armature shaft on a larger scale. Fig. 6 is a central vertical section of a modified form of this device. Fig. 7 is a section on the line 7-7 of Fi 6.

imilar reference characters refer to like parts throughout the several views.

The screen, sieve or riddle 1 is held by the two segmental straps 2 which are mounted on posts 3 secured to the hollow cross bars 4 and 4 which connect to the hollow frame bars 5 by means of Ts 6. An eye 7 in the connection 8 between theupper ends of the frame bars 5 furnishes a means of support Specification of Letters Patent.

Patented Nov. 2, 1920.

Application filed April 12, 1920. Serial N0. 373,248.

for the device and the wires 9 extend through these tubular bars 4 and 5 to the motor which actuates this device. Any other desired means may be used to support the mechanism hereinafter described.

A substantially cylindrical case 11 is formed with lugs 12 into which the tubes 4 and 4 connect and this case has inwardly extending ears 13 at its upper end which are connected to the disk 14 by the screws 15. In this disk 14 is journaled an eccentric 16 which is secured to the upper end of the armature shaft 17. A U-shaped bracket 19 connects to this cylindrical casing 11 in any desired manner, the screws 20 being shown. This bracket has a hemispherical seat 22 for the ball 23 which supports the lower member 24 of the motor casing. The intermediate member 25 of the motor casing is provided with proper pole pieces 26 and the field coils 27. The lower portion 24 is provided with proper sockets 28 for the brushes 29 which engage the commutator 30 of the armature 31. The wires 9 extend from the tube 4 through a passage'33 in the casing 11 and connect to the brushes 29 and to the field coils 27, while a wire 34 connects the two field coils. Any other system of wiring and any desired type of motor may be employed. The motor casing is positioned by means of springs 35 mounted on pins 36 and 37 carried by the motor housing and by the disk 14 and bracket 19. The motor housing is permitted to oscillate freely by means of these springs but is prevented from turning with the armature.

The lower end of the armature shaft 17 is mounted in a ball thrust bearing within the socket 39 formed at the middle of the lower portion 24 of the motor housing, which rests directly on the bearing ball 23. The upper end of the armature shaft is guided by the ball bearing 38 in the socket 40.

When the motor is energized and the armature shaft 17 rotates, the eccentric 16 will cause the upper end of the motor housing to move in a circular path, the armature rotating within the housing in the usual manner. This movement of the armature and housing will cause the center of the riddle 1 to travel in a circular ath and results in the contents of the riddle being sifted through at a very great speed. A cap 44 revents sand getting to the eccentric 16. ile the motor and its housing oscillate or gyrate in the casing, this action also r show causes the casing, the frame and the screen or riddle to gyrate but in the opposite di. rection, which gyratory movement'of the riddle so 'agitates the contents thereof that they become sifted at maximum speed.

It will be understood that the eccentric 16 may be provided with any desired type of friction reducing mechanism. In Fig. 5 I have shown this eccentric 16 provided with two .grooves to receive the balls 41 which bear on the spherical surface 42' formed in the disk 14. The outer arms of the Ts 6 are preferably open so as to admit.

7 thrust bearing. The upper eccentric 48 is journaled in a disk 51 and any suitable ball bearing may be employed. The disks and 51 fit within the cylindrical shell- 55 which is provided with a door 56 of any desiredsize to provide access to the motor.

Connected to this shell 55 and to the disks 5O and'51 are two vertical bars 57 provided with the lugs 58 to receive the tubes 4 and 4 and provided with ears 59 and 60 at their ends which are secured to the disks 50 and 511 respectively by means of the screws 61. c

Themotor housing 62 has pole pieces 63 on which are the field coils 64 and mounted on this housing are two bars 65 which conneat to the wires 66 and 67 leading to the brushes" 68. and to the winding 64 respec- -tively. A wire 69 connects the two field windings 64 in the usual manner. and pins 71 .mounted in the disk 51 connect to the wires9 leading in through the pipe 4. Ball bearings 75 and 76 provide for-the support of the motor housing 62 on the armature shaft- Caps 77 and-78 are employed to exclude dust anddirt from the eccentrics.

around ina circle when the armature rovertical] armature shaft,

tates, but they prevent the motor housing structure shown in Figs. 1 to 4. The fan 82 is repeated in this modification.

The sizes and proportions of the various parts and the details of the motor may all be changed by those skilled the art without departing from the spirit of my invention as set forth claims. 1

I claim V :1. Thecombination of an electric motor embodying a housing an armature and a vertical armature shaft journaled in the housing, a casing, an'eccent'ric secured on one end of the armature 'shaftand journaled in the casing, and means to suspend-the casing. V

2. A casing and a receptacle mounted thereon, an electrlc motor mounted within the casing having an armature shaft, and

means connecting the shaft and casing to cause one end of the shaft to travel in a circle relative to the casing and resilient connectors between the motor and casing.-

3. A casing and an electric motor mountin the following I ed therein, said motor-embodying a vertical armature shaft, an eccentric on each end of the armature shaft, a bearing for each eccentric in the casing, a frame to suspend the casing, frame.

4. A casing and an electric motor therein v embodying a housing, an armature and a an eccentric mounting for each end of the shaft, resilient means to prevent the housing from turning in the casing, a frame and a receptacle mounted on thefra-me-and means connecting the frame to the casing whereby gyratory movements may be communicated to the: receptacle from the casing.

5. A casing andan electric motor therein and a receptacle mounted onthe embodying a housing, an armature'and an i armature shaft journale'd in the housing,

resilient means permitting oscillatory movement but preventing rotary movement of the housing in the casing, and an eccentric on the armature shaft journaled in the easing-to cause oscillation of the housing in the casing.

. ROBERT e. LOWE. 

